Furnace and air conditioner



y 1, 1935. E. l. DAIL 2,002,312

FURNACE AND AIR CONDITIONER Filed July 30, 1932 2 Sheets-Sheet l Ema/WM Ernest 1. DazLL May 21, 1935. E. I. DAIL FURNACE AND AIR CONDITIONER Filed July so, 1932 2 Sheets-Sheet 2 Patented May 21, 1935 UNITED STATES PATENT OFFICE FURNACE AND AIR CONDITIONER Application July 30, 1932, Serial No. 626,362

4 Claims.

This invention relates generally to warm air furnaces of the type in which air from the atmosphere may be washed and otherwise conditioned and mechanically propelled to various points of distribution.

One of the essential objects of the invention is to provide a furnace in which the washing and heating chambers are constructed and arranged in such a way that air from the atmosphere may be preheated before being washed and. may be washed in a. part of the heating chamber by water from a spray head.

Another object is to provide a furnace in which the preheated air may be cleansed by a filter of non-perishable metal that is self-washing with the water spray.

Another object is to provide a furnace wherein the arrangement of filter and spray head is such that water in suspension that has not been absorbed by the air is removed and is prevented from being carried over into thelieating chamber.

Another object is to provide a furnace in which baffles are arranged in such a way relative to the flues that enough of the air from the atmosphere is permitted to wipe the sides and top of the fiues to prevent the latter from overheating.

Other objects, advantages and novel details of construction of this invention will be made more apparent as this description proceeds, especially when considered in connection with the accompanying drawings, wherein:

Figure 1 is a perspective view of a warm air heater embodying my invention;

Figure 2 is a perspective view with the outer jacket or casing removed; i

Figure 3 is a vertical cross sectional view through the furnace;

Figure 4 is an elevation of the structure illustrated in Figure 2 taken at substantially right angles thereto.

My improvements are applicable to various types of warm air furnaces but they are particularly adapted for use in connection with a furnace wherein A is a casing forming the combustion chamber and where either solid or liquid fuel is used in the ash pit. B is an upward extension of the casing tapering to an apex C, and D are down draft fiues arranged upon opposite sides of the casing B and spaced therefrom. Preferably the fiues D are connected at their upper ends to the casing B by laterally extending nipples E while at their-lower ends they are connected to header casings F which lead to the chimney flue (not shown). Thus the products of combustion in passing upwardly through the casing B and downwardly through the fiues D transfer a large portion of their heat to the surroundthe air which is enclosed within an outer jacket G. 6

An air impeller H is arranged at the top of 5 the furnace above the apex C and is enclosed within the jacket G. For supporting the fan there is arranged within the jacket a suitable frame or stand I. J is the rotor shaft journaled in a bearing K outside the jacket G on this stand and L is an electric motor or other driving means also arranged outside of the jacket G. The fan or blower is preferably provided with two spaced housings with the shaft J passing therethrough. The air propelled by the fan is sucked in through openings in the sides of the casing concentric with the shaft and such openings are in free communication with the body of heated air within the jacket G.

In this instance the cold air from the atmos- 20 phere is preferably admitted through the jacket G on opposite sides thereof through vertical openings M. The spaces N within the casing G below said openings are in direct and open communication with the fiues D whereby air received through the openings M may be preheated. Located below and in substantially vertical alignment with the openings M are water spray heads 0 for washing the air that is preheated in the spaces N, while below the spray heads 0 are fil- 30 ters P of non-perishable metal such as bronze or copper. Q are chambers at the bottom of the jacket G for receiving water and air filtered by the filters P. Thus with this construction the air from the atmosphere admitted to the jacket G 5 through the openings M is preheated in the spaces N, consequently such air is permitted to absorb more water. The filters are self-washing with the water spray and the location of the filters below the spray heads is advantageous since the excess water in suspension that has not been absorbed by the air is removed and prevented from being carried over into the heating chamber R.

Preferably the spaces N are separated fro 45 the heating chamber R by bafiies S secured between the fiues D. Battles T project downwardly from the jacket G and are secured to the baffles S above the fiues D so that air passages U are provided between the bafiies S above the fiues D. 50 Thus enough air from the atmosphere admitted to the spaces N is permitted to wipe the sides and tops of the fiues D to prevent overheating of the fiues.

In use air from the atmosphere may flow through the openings M into the spaces or chambers N in the jacket G Where it may contact with and be heated by the flues D before being washed by sprays from the heads 0. Thus the air is preheated to a certain extent before being washed which permits itto absorb more water. A portion of the air received within the spaces N from the openings M will move upwardly over the flues D and through the spaces U into the heating chamber R. Thus enough air from the atmosphere is permitted to wipe the sides and top of the flues D to prevent overheating of the flues. The preheated air after being washed by spray from the spray heads 0 will be filtered by the filters P before entering the chambers Q and R. Since the filters P are of a non-perishable metal that is self-washing with the water spray and are located below the spray heads 0 it will be apparent that excess water in suspension that has not been absorbed by the air will be removed and prevented from being carried into the heating chamber R.

What I claim as my invention is:

l. The combination of a warm air heating furnace, a jacket surrounding the same, a downwardly extending cold air conduit in heat conducting relation to said furnace to receive heat therefrom, said conduit communicating with the interior of said jacket at the lower end thereof, a water spray within the portion of said conduit preheated by said furnace and a self-washing filter in said conduit between said water spray and the communication of the conduit with said jacket.

2. A warm air furnace having a furnace jacket, spaced vertically extending heated flues within said jacket. a vertical conduit adjacent said flues communicating with the spaces between said flues and extending downwardly below the bottom of said fiues, and communicating with the interior of said jacket said conduit having a cold air inlet at the top thereof and a water spray in said conduit below the portion thereof which communicates between said flues for washing the portion of the incoming air passing below the bottom of said fiues into said furnace.

3. A hot air furnace comprising a fire box section provided with a wedge-shaped upward extension, a series of downwardly tapering flue sections at the side of said wedge-shaped section and connected therewith at their upper ends, a cold air conduit adjacent said series of downwardly tapering flue sections and having a portion thereof communicating with the spaces between said flue sections whereby a portion of the incoming air passes between said flue sections and the remaining portions are preheated, means within said conduit for filtering and washing the preheated air therein and means for introducing said washed air between said fire box section and said flue sections.

4. A hot air furnace comprising a fire box section provided with a wedge-shaped upward extension, a series of downwardly tapering flue sections at the side of said wedge-shaped section and connected therewith at their upper ends, a cold air conduit adjacent said series of downwardly tapering flue sections and having a portion thereof communicating with the spaces between said flue sections whereby a portion of the incoming air passes between said flue sections and the remaining portions are preheated, water spraying means within said cold air conduit for humidifying the preheated air, a self-washing filter screen in said conduit below said water spraying means and means for introducing said washed air passing through said filter screen between said fire box section and said flue sections.

ERNEST I. DAIL. 

